Malicious PDF — malware analysis report

Static analysis result for SHA-256 77067b1168d74565…

MALICIOUS

PDF

37.9 KB Created: 2020-09-04 17:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c695e8fabf8f29f33b9496f197166a0e SHA-1: 7746cc826141079506591bb88a808936554bb386 SHA-256: 77067b1168d745650fc24b3db1f63bb1669344ef9ed8db49af4657b3df384b11
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a movie download, which is a common lure for phishing or malware delivery. The PDF also hosts a large number of external links, suggesting a link farm for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=arangetra+velai+tamil+hd+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/8673/3473/files/dokimobelafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/8661082467.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2672/files/47443665874.pdf
    • https://static.usrfiles.com/ugd/b8c837_d008720e64f5469e906359ab5684feeb.pdf
    • https://static.usrfiles.com/ugd/98d33d_849760b1cfee485093aeb3d47d4e0c4b.pdf
    • https://cdn.shopify.com/s/files/1/0443/8245/3926/files/performance_appraisal_journal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/71192495978.pdf
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/29701479433.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/chronicle_of_a_death_foretold.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/58096544798.pdf
    • https://cdn.shopify.com/s/files/1/0433/9403/9975/files/physical_science_10th_edition_tiller.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/1173495468.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/95838408783.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/bhawaiya_gaan_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/judonifosi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000575c.bin
9cd29b5844f851776f41906339071094892f5682a831d3bc317883f7402aca90
pdf-font-stream PDF embedded font (sfnt) at offset 0x575C 5112 bytes
font_01_sfnt_off00006898.bin
8c145038688ee5847f77d207526aeca70864a6f8b8a2149e6678312126eb7183
pdf-font-stream PDF embedded font (sfnt) at offset 0x6898 10052 bytes